Hm, I only can imagine that the RSP and the scanner use the same USB hub and that the overal USB bandwidth is a bottleneck. When the RSP is receiving it "steals" USB bandwidth and the scanner software cannot retrieve enough data in a given timeslot. Also possible could be that the CPU power is not enough to handle both applications. But this is just guessing.Have you tried to connect both devices to different USB hubs in the computer (if possible)?73, Heinrich